As many as 277 pieces of war memorabilia have been swiped from Calgary's The Military Museums, including some donated by Canadian war veterans.

Rank chevrons, cap badges, collar badges, bayonets, berets, stars, medal sets and Allied victory decorations were pinched from Museum exhibits and preparation rooms sometime between August and December of last year in what the museum's executive director Tom Doucette called a "devastating" loss for the facility.

"It's really unfortunate because at the end of the day, The Military Museums are a Canadian treasure and we've been entrusted with the memorabilia and the personal artifacts of military members who have served our great nation," Doucette said.

Police confirmed Thursday they arrested and charged a man on Jan. 29 with possession of stolen property over $5,000 in connection to the thefts.

Since then, 57 items have been recovered, Doucette said.

However, about 220 items, some loaned from collectors and others donated by surviving war heroes and their families, are still missing.

Doucette said the crimes have struck a nerve with Museum staff.

"But it's not only us affected, it's the whole nation. When people steal cultural property that belongs to a nation, it's very disheartening ... sad to say the least," he said.

Curators are in the midst of assembling a detailed list of what was stolen, which they will post to their website within two weeks in hopes of drumming up tips that may lead to the return of as many emblems and accolades as possible, some of which date back to the First World War.

Doucette isn't holding out hope for the return of many pieces, such as the rank chevrons and berets.

"They're common and not identifiable as such. It's the personal ones we can identify that we're going to seek the public's assistance with," he said.

Doucette wouldn't say how the regalia was stolen.

Included in the loot missing are numerous Canadian decorations engraved with service numbers of those awarded, pieces that staff hope through public assistance may find their way back to the Museum.

Among the galleries hit by the thievery were the Army and Air Force Museums of Alberta, the King's Own Calgary Regiment (Royal Canadian Armoured Corps) and the Calgary Highlanders.

The Military Museums is the second-largest of its kind in the country, after the Canadian War Museum in Ottawa.